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El Zorro - a Chilean IRG system
Characteristic Tintina Gold Province* (Fort Knox/Pogo) El Zorro
Age of associated intrusions Cretaceous Jurassic – Cretaceous?
Basement Lithology and age metasediments - Palaeozoic metasediments - Palaeozoic
Intrusion Type Hydrous mafic parent Hydrous mafic parent
Intrusion lithology Granodiorite - monzonite Granodiorite - tonalite - gabbro
Intrusive habit proximal to Au mineralisation Sills and dykes Sills and Dykes
Sulphide minerals Pyrite – Arsenopyrite - Pyrrhotite Pyrite – Arsenopyrite - Pyrrhotite
Hornfels and Skarn orebodies Yes Yes
Vein orebodies Sheeted veins, shear veins, breccias Sheeted veins, shear veins, breccias, stockwork
Vein gangue quartz, albite quartz, albite
Dykes lamprohyres and aplite lamprohyres and aplite
Alteration minerals sericite, albite, K-spar, calcite, quartz sericite, albite, K-spar, calcite, quartz
Metal association Bi, Te, W, As, Sb, Hg As, Sb, Bi, Te, W
Related Association W, Sn skarns Skarns
*Source: Lang & Baker 2001, Min. Dep. 36. 477-489
Stephens, J.R. et al, 2004, Structural and mechanical controls on intrusion-related deposits of the Tombstone Gold Belt, Yukon,
Canada, with comparisons to other vein-hosted ore-deposit types, Journal of Structural Geology 26, 1025-1041.
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TESORO RESOURCES (ASX:TSO) | EL ZORRO PRESENTATION
